JPH02193471A - Disk recorder - Google Patents

Abstract

PURPOSE:To contrive the shortening of access time by moving successively a head in one direction at the time of reproduction by constituting a disk recorder so that an audio signal related to an image recorded in a track for video can be recorded in a track for audio of the outer peripheral part of the track for video. CONSTITUTION:The video signal of a still picture is recorded in the annular track of a magnetic disk 41. When a recording/reproducing changeover switch 11 is set to 'post-recording', an idle track for audio is prepared on the outer peripheral side of the recording track of the video signal. In the case of being set to a split scan mode, one track of the outer periphery of a video track recorded first is prepared as an idle track for audio. To this idle track for audio, an audio signal related to a still picture photographed first at the time of split scan can be brought to post-recording.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk recording device in which an audio signal is recorded together with a still image video signal on, for example, a magnetic disk.

[Summary of the invention]

For example, in a disk recording device that records a time-compressed audio signal together with a still image video signal on a magnetic disk, when performing dubbing recording, each track of the disk is changed from an outer track to an inner track. The tracks are set for audio and then for video in sequence, and the video signal of the ↑most shaded screen is recorded on the track set for video, and the track set for audio at the outer periphery of the track set for video is set for video. By making it possible to record the audio signal related to the video recorded on the recorded track, even if a partially used disc is inserted, the track reserved for audio will not be lost or unnecessary tracks will be created. This prevents the head from being put away, and also allows the head to move sequentially in one direction during playback.

In a disk recording device that records time-compressed audio signals together with still image video signals on a magnetic disk, for example, when performing dubbing recording during continuous shooting, each track of the disk is sequentially recorded. At the start of recording, the outer track was used for audio, and during continuous shooting, the outer track was used for video, and then the inner track was used for video, and the continuously shot images were sequentially recorded on the track designated for video, and then used for audio By making it possible to record the audio signal related to the video recorded on the track designated for video at the start of quick shooting, even if a partially used disc is inserted, the track can be left open for audio. This prevents the loss of tracks and the generation of useless tracks, and also allows the head to move sequentially in one direction during playback.

[Conventional technology]

2. Description of the Related Art Electronic still cameras are known in which a camera body and a playback adapter are configured separately.

In such an electronic still camera, a magnetic disk is attached to the camera body, and a still image video signal captured by an image sensor of the camera body is recorded on this magnetic disk.

During playback, the camera body and the playback adapter are connected, and the still image video signal recorded on the magnetic disk of the camera body is played back by the playback circuit provided on the playback adapter side.

Among such electronic still cameras, development is underway of electronic still cameras that are capable of recording not only still images but also audio signals related to the captured still images.

Note that recording audio signals with an electronic still camera is
For example, JP-A-62-99972, JP-A-62-9
As shown in Japanese Patent No. 5079, an audio signal is collected for a predetermined period of time (5 seconds, 10 seconds, or 20 seconds), and this audio signal is time-compressed into the time equivalent to one field, and then compressed into one track. This is done by recording.

In this way, with electronic still cameras that can record not only still images but also audio signals, it is possible to record not only still images but also audio signals. Audio signals related to the screen are dubbed.

[Problem to be solved by the invention]

By the way, in such an electronic still camera capable of recording audio signals, it is necessary to secure a track for dubbing the audio signals when shooting a still image.

In an electronic still camera, still image video signals are normally recorded sequentially from the outer track. Then, after recording the still image, sound is collected.

Therefore, according to the recording order, a track for recording an audio signal related to the shot still image is secured on the inner circumferential side of the recording track for the shot still image video signal.

However, if you set aside the inner track of the recording track for the still image video signal shot in this way as an audio track for dubbing, when you use a disc that has been recorded halfway, the inner track of the video track The audio tracks reserved for the first time may be lost, or there may be some wasted tracks on a partially recorded disc.

In other words, in an electronic still camera in which the camera body and the playback adapter are configured separately, a playback circuit is not provided on the camera body side. For this reason, it is impossible to determine whether a video signal or an audio signal is recorded on each track of the loaded disc. Therefore, if a partially recorded disc is inserted, it is unclear whether or not this disc has an audio track for dubbing.
Processing cannot be performed depending on whether or not the loaded disc has an audio track reserved on the inner circumference of the video track.

If a partially recorded disc is loaded, assuming that the loaded disc always has an audio track on the inner circumference of the video track, one track on the inner circumference of the recording track will be left vacant and the next recording will be made. If a still image video signal is recorded, and only the still image video signal is recorded on the loaded disc, unnecessary trunks will be generated. Also, if a partially recorded disc is loaded, the loaded disc will always have an audio track on the inner circumference of the video track, and the audio track will be recorded next to the inner track of the recording track. When a still image video signal is recorded, if an audio track is reserved on the inner periphery of a partially loaded disc, the reserved audio track will be lost.

Also, if you reserve the inner track of the recording track for the still image video signal shot in this way as an audio track for dubbing, the head will not be able to move in one direction during playback, and the access time will be reduced. The problem arises that it will be needed for a long time.

In other words, since audio signals are recorded in a time-compressed manner, it is necessary to capture the reproduced audio signals into memory in order to reproduce the audio signals. Therefore, in order to play the video signal and audio signal at the same time,
First, you need to play the audio track. Therefore, if an audio signal is recorded on the inner track of the recorded still image video signal, after the head is moved to the inner track of the audio signal, The still image will be moved to the recording track of the video signal.

On the other hand, in electronic still cameras, still image video signals are usually recorded sequentially from the outer track. Therefore, if you reserve the inner track of the recorded still image video signal as the audio track for dubbing, the head will move back and forth between the outer and inner sides during playback. will be done. In this way, when the head is moved back and forth between the outer circumferential side and the inner circumferential side, a long access time is required during reproduction.

Therefore, an object of the present invention is to provide a disk recording device that prevents tracks left open for audio from being lost or wasteful tracks even when a partially used disk is loaded. Our goal is to provide the following.

Another object of the present invention is to provide a disk recording device in which the head can be sequentially moved in one direction during reproduction and the access time can be shortened.

[Means to solve the problem]

The present invention provides a disc recording device that records a time-compressed audio signal on a disc together with a still image video signal, and when performing dubbing recording, each track of the disc is sequentially recorded from the outer track to the inner track. It is now possible to record audio signals related to the images recorded on the tracks designated for video in the trunks designated for audio and on the outer periphery of the tracks designated for video. This is a disc recording device characterized by the following.

This invention provides a disk recording device that records a time-compressed audio signal on a disk together with a still image video signal, and when performing dubbing recording during continuous shooting, each track of the disk is After the tracks are set for audio, during quick shooting, the tracks are set for video sequentially from the outer track to the inner track, and the audio related to the video recorded on the track set for video at the start of quick shooting is added to the track set for audio. This is a patented recording device characterized by being able to record signals.

[Effect]

In the post-recording mode, when the single-shot mode is set, an empty track for audio is prepared on the outer circumferential side of the video track each time the release button 18 is pressed to take a still image one by one. In addition, when the continuous shooting mode is set, first, one track on the outer periphery is set as an empty track for audio, and then the still image video signal is sequentially transferred to the next track while the release button is pressed. Recorded continuously.

In this way, if you provide an empty track for audio on the outer circumference of the video signal recording track, when you use a disc that has been partially recorded, the audio track reserved on the outer circumference of the video track will be saved. This eliminates the possibility of lost tracks or unnecessary tracks on a partially recorded disc.

〔Example〕

An embodiment of the present invention will be described in the following order.

a, Explanation of the external appearance of the camera body, Explanation of the external appearance of the playback adapter C, Configuration of the camera body d, Configuration of the playback adapter e, Explanation of processing in dubbing mode with the camera body alone f, Simultaneous operation with the camera body alone Explanation of the processing in recording mode g, Explanation of the processing during dubbing when the playback adapter is connected a, Explanation of the appearance of the camera body In the electronic still camera to which this invention is applied, in addition to still images, there are Audio signals can be recorded.

FIG. 1 shows the entire camera body l to which the present invention is applied. In FIG. 1, an imaging lens, a strobe light emitting window, etc. are arranged on the front side surface IA of the camera body 1, although not shown.

Viewfinder 2 is located on the rear side IB of the camera body l.
, a built-in microphone 3, and an external microphone jack 4 are provided. Further, a connector 5 for connecting a playback adapter is provided on the rear side IB of the camera body 1.

A disk insertion slot 6 is provided at the center of the rear side of the camera body 1. A magnetic disk cassette 7 (FIG. 2) is inserted into this disk insertion slot 6.

Still images and related audio signals are recorded on the magnetic disk 41 housed in the magnetic disk cassette 7. The magnetic disk cassette 7 can be ejected by an eject switch 8.

A cover 9 is provided to cover the upper IC of the camera body 1.

A battery storage recess is formed at a position corresponding to this cover 9, and a charging pack or a dry battery is stored in this battery storage recess.

A liquid crystal display 10 is disposed near the disk insertion slot 6. Various operation setting states are displayed on this liquid crystal display 10. For example, when performing dubbing, the number of seconds remaining for sound recording is displayed.

Also, if you want to interrupt sound collection and delete the audio, press "E".
is displayed. Furthermore, a warning is displayed on the liquid crystal display 10 indicating that the number of remaining tracks is decreasing.

The camera body 1 is provided with various switches.

These switches will be explained.

11 is a recording/playback mode changeover switch. The recording/reproducing mode changeover switch 11 is a three-position slide switch. This recording/reproduction mode changeover switch 11 allows setting of three audio recording modes: "no sound", "dubbing", and "simultaneous recording".

When using the camera body 1 alone, set the recording/playback mode selector switch 11 to the "dubbing" position (and by operating the dubbing switch 12, which will be described later).
It becomes possible to post-record audio signals related to photographed still images. The possible time for audio input during dubbing is, for example, 9.6 seconds. If the recording/playback mode selector switch 11 is set to the "simultaneous recording" position, audio input will be possible for, say, 9.6 seconds from the time still image shooting ends, and the audio signals input during this time will be It is recorded in conjunction with the still image taken.

Note that in the "no sound" position, only still image shooting is performed.

When the camera body 1 and the playback adapter 21 (Fig. 3) are connected and used, the playback screen is only visible when the recording/playback mode selector switch 11 is set to the "dubbing" position or the "simultaneous recording" position. The audio signals related to this can be dubbed while recording. In addition,
When the camera body 1 and playback adapter 21 are connected and used, the recording/playback mode selector switch 11 is set to "dubbing".
The operation when set to the ``simultaneous recording'' position is the same as the operation when set to the ``simultaneous recording'' position.

12 is a dubbing switch. When the dubbing switch 12 is operated to input audio to the built-in microphone 3 or an external microphone attached to the external microphone jack 4, audio signals can be recorded. As the dubbing switch 12, in order to prevent erroneous operation, a switch that enters the dubbing state when the protrusion 12A is pushed and slid is used. In addition, a switch like this does not move unless it is pressed, so there is no noise from the switch operation.

Reference numeral 13 denotes a bushing switch which functions as an audio repeat switch during reproduction and as a half-release state setting switch during recording. That is,
When the button switch 13 is pressed during playback, the audio signal is repeatedly played back. Button switch 1 when recording
When 3 is pressed, power is supplied to the imaging section and the recording section, the disk starts rotating, and the camera is set to a shooting standby state.

14 is a mode switch. This mode switch 14
is a four-position rotary switch, and this mode switch 14 allows setting of four modes: "Lock", "Single Shooting", "Continuous Shooting", and "High Speed Continuous Shooting". In single-shot mode, one image is photographed each time a release button 18 (described later) is pressed. In the continuous shooting mode, continuous shooting is performed while the release button 18 is pressed. However, when the recording/playback mode selector switch 11 is set to the "simultaneous recording" position, the mode switch 14 is set to "continuous recording".
Even if you set the camera to this position, single shot will be taken.

15 is a self-timer switch. With this self-timer switch 15 pressed in, release button 1
By pressing 8, timer photography is performed.

16 is a buzzer on/off switch. When the buzzer is set to the on state, various warnings and, for example, the start time and end time of sound collection during dubbing can be known from the buzzer sound.

17 is a blank search mode setting switch. When the blank search mode is set, the next photographed signal can be recorded on an empty track on the magnetic disk 41.

18 is a release button. The release button 18 is
It can be pushed in two stages. When the release button 18 is pressed lightly, power is supplied to the imaging section and the recording section, the rotation of the disk is started, and the shooting standby state is set. When the release button 18 is fully pressed, a still image captured by the image sensor at this time is recorded. Further, the release button 18 functions as a frame advance switch during playback.

This camera body 1 alone can record still images and audio signals related thereto. When performing playback, connect the playback adapter 21 (described later) to the camera body 1.
need to be connected to.

b. Explanation of external appearance of reproduction adapter FIG. 3 shows the reproduction adapter 21 as a whole. This playback adapter 21 is used by being connected to the camera body 1 when playing back still images taken with the camera body 1.

In FIG. 3, the upper surface 21A of the regeneration adapter 21 has a storage opening 2 for storing the charging pack 23 or dry batteries.
2 is formed. A cover 24 is slidably attached to the upper part of the reproduction adapter 21 so as to cover the storage recess 22.

Connecting cable 25 from side 21B of playback adapter 21
is led out, and a connector 26 is attached to the tip of the connection cable 25. When a still image taken with the camera body 1 is to be reproduced using the reproduction adapter 21, this connector 26 is engaged with the connector 5 of the camera body 1.

An output terminal 27 is provided on the side surface 21C of the playback adapter 21. This output terminal 27 is connected to an input terminal of a monitor receiver. Also, the side 2 of the playback adapter 21
A DC input terminal 28 is provided at 1C. A plug 30 of an AC adapter 29 is connected to this DC input terminal 28 .

Reference numeral 31 represents a playback button for playing back still images one frame at a time. 32 is a continuous playback button for continuously playing still images, for example every 5 seconds; 33 is a stop button; 34
is a reverse button, 35 is a forward button, 36 is an erase button for erasing still images one frame at a time,
37 is an auto erase button for erasing all signals on the magnetic disk. Note that the cover 24 of the reproduction adapter 21 is normally in a closed state, and the charging pack 23 and the operation buttons 31 to 37 are not exposed to the outside.

C. Explanation of the configuration of the camera body FIG. 4 shows the configuration of the camera body l.

In FIG. 4, 41 is a magnetic disk.

This magnetic disk 41 is housed in a magnetic disk cassette 7, as shown in FIG. The magnetic disk 41 is rotated by a spindle motor 42. The rotation of the spindle motor 42 is controlled by the system controller 48.
It is controlled by a spindle servo circuit 43 under the control of.

44 is a magnetic head, and the magnetic head 44 performs recording/reproduction on the magnetic disk 41.

The position of the magnetic head 44 is controlled by a tracking servo circuit 45 under the control of a system controller 4.

A key switch 47 is connected to the system controller 48 . The key switch 47 is composed of various switches on the camera body 1.

Further, a liquid crystal display 10 is connected to the system controller 48 . Various setting states are displayed on this liquid crystal display lO. A buzzer 46 is connected to the system controller 48. If necessary, this buzzer 46
is sounded.

By operating the key switch 47, still images and audio signals can be recorded.

switch circuit 61, switch circuit 63, switch circuit 6
4 is switched between when recording a video signal and when recording an audio signal. When recording video signals, the switch circuit 6
1. The switch circuit 63 and the switch circuit 64 are each a
can be switched to the side.

When recording an audio signal, the switch circuit 61, the switch circuit 63, and the switch circuit 64 are each switched to the b side.

Further, the switch circuit 66 is switched between recording and reproduction. When recording a video signal or an audio signal, the switch circuit 66 is switched to the a side.

First, the case of recording a still image video signal will be explained. Note that at this time, the switch circuit 61 and the switch circuit 63 are each switched to the a side, and the switch circuit 66 is switched to the a side. In Figure 4, CCD
A lens 50 . A subject image is formed through the iris ring 51. Image sensor 4
9 is supplied to a line sequential processing circuit 54 via an amplifier 52 and a process circuit 53.

The opening and closing of the iris ring 51 is controlled by the output of the iris drive circuit 55. Iris control circuit 55 is controlled based on instructions from system controller 48.

This performs iris control. Further, the image sensor 49 is driven by the output of the drive circuit 56. The drive circuit 56 is controlled based on commands from the system controller 48.

The line sequential circuit 54 converts a luminance signal Y and line sequential color difference signals (R-Y) and (B) from the component color video signal.
-Y). A signal captured by the image sensor 49 and passed through an amplifier 52 and a process circuit 53 is processed by a line sequential circuit 54 into a luminance signal Y and a line sequential color difference signal (R
-Y) and (B-Y).

The line sequential color difference signals (R-Y) and (B-Y) from the line sequential circuit 54 are sent to F via a pre-emphasis circuit 57.
The signal is supplied to the M modulation circuit 58. The FM modulation circuit 58 performs FM modulation on the line sequential color difference signals (R-Y) and (B-Y). The output of the FM modulation circuit 58 is supplied to one input terminal of the addition circuit 59.

The luminance signal Y from the line sequential circuit 54 is sent to the FM modulation circuit 6 via a pre-emphasis circuit 60 and a switch circuit 61.
2. The FM modulation circuit 62 converts the luminance signal Y to FM.
Modulated. The output of the FM modulation circuit 62 is connected to the switch circuit 6
3 to the other input terminal of the adder circuit 59.

The adder circuit 59 adds the FM output from the FM modulation circuit 58.
Modulated line sequential color difference signals (R-Y) and (B-Y)
and the FM-modulated luminance signal Y output from the FM modulation circuit 62 are frequency division multiplexed.

The output of the adder circuit 59 is sent to the switch circuit 64 and the recording amplifier 6.
5. The signal is supplied to the magnetic head 44 via the switch circuit 66. A video signal is recorded on the track of the magnetic disk 41 by the magnetic head 44 .

69 is a strobe discharge tube. A discharge circuit 70 is connected to the strobe discharge tube 69 . This strobe discharge tube 69 is used when photographing using a strobe. The strobe discharge tube 69 is controlled by the system controller 48.
This is done based on control signals from.

71 is a diode for photometric detection. diode 71
The current flowing through is detected by the detection circuit 72, and the detection output is supplied to the system controller 48.

Next, the case of recording an audio signal will be explained.

When recording audio signals, the switch circuit 61
, switch circuit 63, and switch circuit 64 are switched to the b side.

Audio input can be performed using the built-in microphone 3 as well as from an external microphone 83 connected to the external microphone jack 4. When using the built-in micro hole 3, the switch 81 is switched to the a side. When using the external microphone 83, the switch 81 is switched to the b side. This switch 81
The switching state of is detected by the switch detection means 82,
This detection signal is supplied to the system controller 48.

Built-in microphone 3 or external microphone jack 4
An audio signal from an external microphone 83 connected to is supplied to an amplifier 84 via a switch 81. The output of the amplifier 84 is band-limited via a bypass filter 85 and a low-pass filter 86, and is then passed through a compressor 87 for noise removal. Then, it is digitized by an A/D converter 88.

A sampling clock having a frequency fs is supplied to the A/D converter 88 from a write clock generation circuit 89. Further, a clock from a write clock generation circuit 89 is supplied to an address counter 91.

Address counter 91 is controlled by the output of system controller 48. During writing, the address from the address counter 91 is sent to the write clock generation circuit 8.
9 with a frequency fs.

The audio signal digitized by the A/D converter 88 is written into the RAM 90 according to the write address from the address counter 91.

During reading, the address from address counter 91 is advanced by a clock with a frequency of 640 fs output from read clock generating circuit 92. According to the read address output from address counter 91, the audio signal stored in RAM 90 is read out.

The output of the RAM 90 is returned to an analog signal by a D/A converter 93. The D/A converter 93 is supplied with a clock having a frequency of 640 fs from the read clock generation circuit 92.

In this way, the input audio signal is digitized using the sampling clock of frequency Is and written into the RAM 90, and the digital audio signal stored in the RAM 90 is read out using the clock of frequency 64fs. As a result, the audio signal is time-axis compressed to 1/640.

The output of the D/A converter 93 is supplied to an adder circuit 94. The flag and control code generating circuit 95 generates a flag and a control code indicating linkage information in the adder circuit 94 at a predetermined timing. This flag and control code are added to a predetermined position of the time-base compressed audio signal.

The output of the adder circuit 94 is supplied to the FM modulation circuit 62 via the pre-emphasis circuit 96 and the switch circuit 61.

FM modulation times! The output of 62 is supplied to the magnetic head 44 via a switch circuit 63, a switch circuit 64, a recording amplifier 65, and a switch circuit 66. By the magnetic head 44,
This time-base compressed audio signal is transferred to the magnetic disk 4.
1 is recorded.

The system controller 48 of the camera body 1 and the system controller 101 (FIG. 5) of the playback adapter 21 are bidirectionally connected via an interface 97 and an interface 102.

In addition, the output terminal 68 is the input terminal 1 of the playback adapter 21.
11.

Next, the time of reproduction will be explained. During reproduction, the switch circuit 66 is switched to the b side. And magnetic head 4
The reproduction signal of No. 4 is outputted from the output terminal No. 6 via the switch circuit 66 and the amplifier 67.

Further, the output of the amplifier 67 is supplied to a signal detection circuit 98. Although playback operations cannot be performed with this camera body 1 alone,
Whether a signal is recorded on a track of the magnetic disk 41 can be detected from the output of the signal detection circuit 98. The detection signal of this signal detection circuit 98 is supplied to the system controller 48.

d. Configuration of playback adapter FIG. 5 shows the configuration of the playback adapter 21.

In FIG. 5, the input terminal 111 is connected to the output terminal 68 of the camera body 1. In FIG. The system controller 101 also connects the system controller 4 of the camera body 1 via the interface 102 and the interface 97.
8 and is bidirectionally connected. Further, a key switch 103 consisting of various operation switches provided on the playback adapter 21 is connected to the system controller 101 .

The output from the output terminal 68 of the camera body 1 is input from the input terminal 111 of the playback adapter 21.

The switch circuit 113, the switch circuit 120, and the switch circuit 122 are switched between when reproducing a video signal and when reproducing an audio signal. When reproducing a video signal, the switch circuit 113, the switch circuit 120, the switch circuit 122
are respectively switched to the a side. At the time of audio signal reproduction, the switch circuit 113, the switch circuit 120, and the switch circuit 122 are each switched to the b side.

First, the video signal reproduction will be explained. When reproducing a video signal, the switch circuit 113, the switch circuit 120, and the switch circuit 122 are switched to the a side. Input terminal 1
A video signal reproduced from the magnetic disk 41 of the camera body 1 is supplied to 11 . This video signal is a signal obtained by frequency division multiplexing an FM-modulated luminance signal Y and FM-modulated line-sequential color difference signals (RY) and (B-Y).

A video signal from an input terminal 111 is supplied to a bandpass filter 114 and a bandpass filter 119 via an amplifier 112 and a switch circuit 113.

The bandpass filter 114 extracts the FMimed line sequential color difference signals (RY) and (BY). The output of this bandpass filter 114 is supplied to an FM demodulation circuit 116. The FM demodulation circuit 116 demodulates the line sequential color difference signals (R-Y) and (B-Y). FM
The output of the demodulation circuit 1/6 is supplied to a video signal processing circuit 118 via a de-emphasis circuit 117.

The bandpass filter 119 extracts the FMilled luminance signal Y. The output of the bandpass filter 119 is supplied to the FM demodulation circuit 121 via the switch circuit 120. The FM demodulation circuit 121 demodulates the luminance signal Y. The output of the FM demodulation circuit 121 is sent to the switch circuit 12
2. The signal is supplied to the video signal processing circuit 118 via the de-emphasis circuit 123.

The video signal processing circuit 118 processes a line sequential color difference signal (R-
Y) and (B-Y), and the component signal Y
and (RY), (BY).

The output of video signal processing circuit 118 is provided to NTSC encoder 124. The NTSC encoder 124 converts the component signals Y and (RY), (B-Y) to N
A TSC-based composite color video signal is formed. This NTSC composite color video signal is output from the output terminal 125.

Next, the time of audio signal reproduction will be explained.

When reproducing an audio signal, the switch circuit 113, the switch circuit 120, and the switch circuit 122 are each switched to the b side.

A playback audio signal that has been time-base compressed and FM modulated is supplied to an input terminal 111 . This reproduced audio signal is supplied to an FM demodulation circuit 121 via an amplifier 112, a switch circuit 113, and a switch circuit 120. FM
The demodulation circuit 121 performs FM demodulation on the audio signal from the input terminal 111.

The output of the FM demodulation circuit 121 is supplied to a de-emphasis circuit 131 via a switch circuit 122. The output of the de-emphasis circuit 131 is supplied to the A/D converter 134 via the low-pass filter 132, and
The flag and control code are detected by a flag and control code detection circuit 133. This detection output is supplied to the system controller 101.

A clock with a frequency of 640 fs is supplied to the A/D converter 134 from a write clock generation circuit 135. The A/D converter 134 samples the time-base compressed audio signal using a clock having a frequency of 640 fS.

Also, the frequency 6 from the write clock generation circuit 135
A 40 fs clock is supplied to the address counter 137. During writing, the address output from the address counter 137 is advanced by this clock with a frequency of 640 fs. This write address is supplied to RAM 136.

The output of the A/D converter 134 is supplied to the RAM 136, and the audio signal from the A/D converter 134 is written into the RAM 136.

During reading, a clock with a frequency fs from the read clock generation circuit 138 is supplied to the address counter 137, and the address output from the address counter 137 is advanced by the clock with a frequency fs. By the address from this address counter 137, the RAM 13
The audio signal stored in 6 is read out.

The output of RAM 136 is supplied to D/A converter 139. The D/A converter 139 is supplied with a clock of frequency fs from the read clock generation circuit 138. The output of the RAM 136 is converted back to an analog signal by a D/A converter 139.

In this way, the playback audio signal that has been time-axis compressed to 1/640 is stored in the RAM 13 using a clock with a frequency of 640fs.
6 and read with a clock of frequency fs, the time axis is returned to its original state.

The output of the D/A converter 139 is a low-pass filter 140.
, are taken out from the output terminal 142 via the expander 141.

When reproducing an audio signal using this reproduction adapter 21, information about what kind of signal is recorded on which track is required. Index table 14
3, information such as what kind of signal is recorded on which track is recorded. Further, in order to create such an index table, a flag and control code detection circuit 133 and a vertical synchronization detection circuit 144 are provided.

e. Explanation of processing when the camera body 1 is in the dubbing mode This will be explained with reference to the flowchart shown in the figure.

When the single-shot mode is set by the mode switch 14, one still image is taken each time the release button 18 is pressed. The video signal of this still image is recorded on an annular track of the magnetic disk 41. When the recording/reproducing mode changeover switch 11 is set to "dubbing", an empty track for audio is prepared on the outer circumferential side of the video signal recording track. If the user remembers the history of the recording state of the day magnetic disk 41, it is possible to post-record the audio signal related to the photographed still image on this empty track for audio. The sound collection time during dubbing was 9.6 seconds.

Furthermore, when the continuous shooting mode is set, still images are continuously shot while the release button 18 is kept pressed. The video signal of this still image is recorded on an annular track of the magnetic disk 41. When the recording/reproducing mode changeover switch 11 is set to "dubbing", one track on the outer periphery of the video track recorded first during continuous shooting is prepared as an empty track for audio. An audio signal related to the first still image taken during continuous shooting can be dubbing onto this empty track for audio. The sound collection time during dubbing was 9.6 seconds.

That is, in FIG. 6, it is determined in step 151 whether the release button 18 has been pressed. If the release button 18 has been pressed, it is determined whether the single shooting mode is selected (step 152). In the single shooting mode, one track is left open on the outer circumferential side, and a video signal is recorded on the track of the magnetic disk 41 after shooting (step 153).

When the release button 18 is pressed, in the snapshot mode, first, one track on the outer periphery is cleared (step 154).
), and the video signal is recorded on the next track (step 15).
5) Then, it is determined whether the release button 18 is pressed (step 156), and the release button 1 is pressed.
If 8 remains pressed, the process returns to step 155 and the video signal of the next still image is continuously recorded on the next track.

As a result, as shown in FIG. 7A, in the single shooting mode, the still image video signal recording track VII% v
Empty track A for audio on the outer circumference side of +z, ...
Al15A1, . . . are provided respectively.

In addition, in the case of snapshot mode, as shown in Figure 7B,
Empty track A for audio on the outer circumference! I is provided, and on its inner periphery is a recording track V! of continuously shot still image video signals. ,,V, ,Vt3... are provided.

In FIG. 6, it is determined whether the dubbing switch 12 has been pressed (step 157), and if the dubbing switch 12 is pressed, a buzzer sounds for 0.4 seconds to notify the start of sound collection (step 158). After waiting 0.4 seconds after the dubbing switch 12 is pressed and released (step 159), the sound collection time T is initialized to 0 (step 160). Sound collection starts 0.4 seconds after the dubbing switch 12 is pressed and released (step 161).

It is determined whether or not the dubbing switch 12 is pressed during sound collection (step 162), and if the dubbing switch 12 is not pressed during sound collection, the release button 18 is pressed during sound collection.
It is determined whether the is pressed halfway (step 163
), if the release button 18 is not pressed halfway during sound collection, it is determined whether the sound collection time T, , has elapsed for 9.6 seconds (step 164).

When 9.6 seconds have elapsed in the sound collection time T, a buzzer sounds (step 165) to notify that the sound collection time has ended. Then, it is determined whether the mode is single shooting mode or continuous shooting mode (step 166). In the single shooting mode, the collected audio signal is recorded in an empty track provided on the outer periphery of the still image video signal recording track (step l67). In the quick shooting mode, the collected audio signal is recorded in an empty track provided on the outer periphery of the recording track of the first still image video signal during continuous shooting (step 168).

Recording may fail while collecting sound. In this case,
The dubbing switch 12 is pressed during sound recording, or
The release button 18 is pressed halfway during sound collection.

In step 162, it is determined whether the dubbing switch 12 has been pressed during sound collection. Further, in step 163, it is determined whether the release button is pressed halfway. If the dubbing switch 12 is pressed during sound collection or the release button 18 is pressed halfway during sound collection, it is determined whether the mode is single shooting mode or continuous shooting mode (step 169).

In the single-shot mode, the signals of the outer tracks of the recording track of the still image video signal are erased (step 170).
.

In the snapshot mode, the signals of the tracks on the outer periphery of the recording track of the first still image video signal during continuous shooting are erased (step 171).

A photo opportunity may occur while recording sound.

In this case, the release button 18 is fully pressed. When the release button 18 is fully pressed, still image shooting is prioritized over sound collection. This allows you to take pictures without missing a photo opportunity.

That is, in step 172, it is determined whether the release button 18 has been fully pressed.

If the release button 18 is fully pressed, one track on the outer periphery is left open for audio, and a still video signal is recorded (step 173).

f. Description of processing in simultaneous recording mode with camera body 1 alone FIG. 8 shows processing when camera body 1 is set alone in simultaneous recording mode. "Simultaneous recording"
The mode is set by the recording/reproducing mode changeover switch 11. In the "simultaneous recording" mode, each time the release switch 18 is pressed and a still picture is taken one by one, the video signal of this still picture is recorded on the annular track of the magnetic disk. At this time, an empty track is provided on the outer peripheral side of the video signal recording track. At the same time, when a still image is taken, a state is set in which an audio signal can be input. The input audio signal is then recorded in association with the photographed still image. The sound collection time when the audio signal is input is 9.6 seconds.

That is, in FIG. 8, it is determined whether or not the release button 18 has been pressed (step 2.1). If the release button 18 is pressed, one track on the outer periphery is left open for audio and the video signal is recorded. (Step 20
2).

Then, the buzzer sounds for 084 seconds (step 203).
), the rotation of the disk is stopped (Sten 7'204)
. Wait 0.4 seconds (step 2゜5) and set the sound collection time Tfi.
is set to 0 (step 206).

The reason why sound collection is started after waiting 0.4 seconds in this way is to allow sound collection to be performed while the rotation of the disk is completely stopped. If the disk is rotating during sound collection, noise generated by the rotation of the disk may be mixed in.

When the sound collection time Tn is set to 0, sound collection is performed (step 207).

It is determined whether the dubbing switch 12 was pressed during sound collection (step 208). If the dubbing switch 12 was not pressed during sound collection, it is determined whether the release button 18 was pressed halfway (step 208). 209).

During sound recording, the dubbing switch 12 and release button 18 are pressed.
If has not been pressed, it is determined whether the sound collection time T has reached 9.6 seconds (step 210).

When the sound collection time T reaches 9.6 seconds, a buzzer sounds for 0.4 seconds (step 211), and the disk is rotated (step 212). Then, the input audio signal is recorded in an empty track on the outer periphery of the still image video signal recording track (step 213).

Recording may fail while collecting sound. In this case,
The dubbing switch 12 is pressed during sound recording, or
The release button 18 is pressed halfway during sound collection.

In step 208, it is determined whether the dubbing switch 12 has been pressed during sound collection. Further, in step 209, it is determined whether the release button 18 is pressed halfway. If the dubbing switch 12 is pressed during sound collection or the release button 18 is pressed halfway during sound collection, the signals of the outer tracks of the recording track of the still image video signal are erased (step 214 ).

A photo opportunity may occur while recording sound. In this case, the release button 18 is fully pressed. When the release button 18 is fully pressed, still image shooting is prioritized over sound collection. That is, if the release button 18 is fully pressed in step 215, one track on the outer periphery is made available for audio, and a still image video signal is recorded (step 216).

g. Description of processing during dubbing when playback adapter is connected FIG. 9 shows the processing when performing dubbing with the camera body 1 and playback adapter 21 connected.

When the camera body 1 and the playback adapter 21 are connected and the dubbing switch 12 is pressed, dubbing can be performed.

When the camera body 1 and the playback adapter 21 are connected, the recording/playback mode selector switch 11 is set to "dubbing" or "dubbing".
Dubbing can only be performed if the mode is set to ``Simultaneous Recording'' and you are using manual frame-by-frame forwarding during playback. When connecting the external microphone 83 to the external microphone jack 4 and collecting sound using this external microphone 83,
It is possible to collect sound while the screen is playing.

When collecting sound using the built-in microphone 3, the rotation of the disk is stopped and the playback screen is muted. This is to prevent the rotation sound of the disk from being mixed in as noise when the built-in microphone 3 is used.

In FIG. 9, it is determined whether the dubbing switch 12 has been pressed (step 301).

At this time, it is determined whether the recording/playback mode selector switch 11 is set to "dubbing" or "simultaneous recording" (step 302), and it is determined whether playback is in progress (step 303L) A determination is made (step 304).

If the recording/playback mode selector switch 11 is set to "dubbing" or "simultaneous recording" and the dubbing switch 12 is pressed while playback is in progress and manual frame advance is selected, the 0
．． A buzzer sounds for 4 seconds (step 305) to notify that sound collection will start.

At this time, if there is a reproduced sound (step 306), it is immediately muted (step 307), and it is determined whether the external microphone 83 is connected to the external microphone jack 4 (step 308).

If an external microphone 83 is connected to the external microphone jack 4, this external microphone 83 will
Sound recording is performed.

In other words, if the external microphone 83 is connected to the external microphone jack 4, wait 0°4 seconds (
Step 309), the sound collection time T7 is set to 0 (Step 310). And external microphone jack 4
Sound is collected by the external microphone 83 connected to the external microphone 83 (step 311).

It is determined whether the dubbing switch 12 was pressed during sound collection (step 312), and if the dubbing switch 12 was not pressed during sound collection, it is determined whether the sound collection time T7 of 9.6 seconds has elapsed. (step 313).

When the sound collection time Tfi has elapsed for 9.6 seconds, a buzzer sounds for 0.4 seconds (step 314), and the video is muted (step 315).

Then, it is determined whether there is an audio track corresponding to the video (step 316), and if there is an audio track corresponding to the video, the audio signal collected on the track corresponding to the video is recorded (step 317). ), once the audio signal is recorded, the original video is returned to and the still image is played back (step 318).

If there is no audio track corresponding to the video, it is determined whether there is an empty track on the outer periphery of the video signal recording track (step 319).

If there is an empty track on the outer periphery of the video track, the audio signal collected in the empty track on the outer periphery of the video track is recorded (step 320). Once the audio signal has been recorded, the process proceeds to step 318, where the original video is returned and the still image is played back.

If it is determined in step 319 that there is no free track on the outer circumference of the video track, the audio signal collected in the free track on the inner circumference of the video track is recorded (step 321).If the audio signal is recorded, step 318 , the original video returns and the still image is played.

In this way, when it is determined in step 308 that the external microphone 83 is connected, sound is collected without stopping the rotation of the disk. Therefore, it is possible to record sound while viewing the playback screen.

When it is determined in step 308 that the external microphone 83 is not connected, the video is immediately muted (step 322L) and the rotation of the disk is stopped (step 323).

Then, after waiting 0.4 seconds (step 324), the sound collection start time T is initialized (step 325).
．． 4 seconds corresponds to the time until the rotation of the disk completely stops.

After the sound collection time Tfi is initialized, sound collection is started (step 326).

It is determined whether or not the dubbing switch 12 is pressed during sound collection (step 327L).
If 2 is not pressed, it is determined whether the sound collection time Tfi has elapsed for 9.6 seconds (step 328).

When the sound collection time T7 has elapsed for 9.6 seconds, a buzzer sounds for 0.4 seconds (step 329), the rotation of the disk is started (step 330), and the process goes to step 316.

In this way, when it is determined in step 308 that the external microphone 83 is not connected and the built-in microphone 3 is used to collect sound, the rotation of the disk is stopped in step 323 before sound collection, and the rotation of the disk is stopped in step 323 before sound collection. Rotation of the disk is started in step 330, and rotation of the disk is stopped during sound collection.

This can prevent noise from being mixed in due to the rotational sound of the disk during sound collection.

There are times when recording fails while collecting sound. In this case, the dubbing switch 12 is pressed during sound collection.

If it is determined in step 312 or step 327 that the dubbing switch 12 has been pressed during sound recording, it is determined whether there is an audio track corresponding to the video (
Step 331). If there is an audio track corresponding to the video, the audio signal recorded on this audio track is erased (step 332).

〔Effect of the invention〕

According to this invention, in the mode during dubbing recording, when the single-shot mode is set by the mode switch 14, each time the release button 18 is pressed and a still image is taken one by one, the outer circumferential side of the video track is A free track for audio is created. In addition, when the snapshot mode is set, first one track on the outer periphery is set as an empty track for audio, and then as long as the release button 18 is pressed, the next track is sequentially filled with stills and video signals. recorded.

In this way, if you create an empty track for audio on the outer periphery of the video signal recording track, when you use a disc that has been partially recorded, the audio track reserved on the outer periphery of the video track will not be lost. This eliminates the possibility of tracks being lost or wasted tracks on a partially recorded disc.

In other words, in the dubbing recording mode, if a partially recorded disc is loaded, the signal will not be recorded, regardless of whether each track on the loaded disc has a track for audio recording. A video signal is recorded by leaving one track for audio on the outer circumferential side of the inner circumferential track of the track being recorded.

In electronic still cameras, tracks are used in order starting from the outer circumference, so if you do this, even if there is an audio track on a partially recorded disc, this track will not be erased, and Even if only the video signal is recorded on the installed disc,
There are no unnecessary tracks.

Further, when a track corresponding to the outer circumferential side of the video track is recorded, the head is sequentially moved from the outer circumferential side to the inner circumferential side during playback, so that the access time during playback can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of a camera body to which this invention is applied, FIG. 2 is a perspective view of an example of a magnetic disk cassette in an embodiment of this invention, and FIG. 3 is a perspective view of an example of a playback adapter. FIG. 4 is a block diagram showing the configuration of an example of a camera body to which the present invention is applied, FIG. 5 is a block diagram showing the configuration of a playback adapter, and FIG. 6 is a flowchart used to explain an embodiment of the present invention. FIG. 7 is a route map used to explain one embodiment of the present invention, and FIGS. 8 and 9 are flowcharts used to explain one embodiment of this invention. Explanation of main symbols in the drawings 1: Camera body, 3: Internal microphone, 4: External microphone jack, 21 Playback adapter 41: Magnetic disk, 44: Magnetic head, 48 Niji stem control convex,
49: fl image element. Agent Patent Attorney Tadashi Sugiura Siblings Figure 1 Figure 2

Claims (2)

[Claims] (1) In a disc recording device that records a time-compressed audio signal on a disc along with a still image video signal, when performing dubbing recording, each track of the disc is sequentially moved from the outer track to the inner track. For audio and for video, it is possible to record audio signals related to the images recorded on the tracks for video on the tracks for audio on the outer periphery of the tracks for video. A disc recording device characterized by: (2) In a disk recording device that records a time-compressed audio signal on a disk together with a still image video signal, when performing dubbing recording during continuous shooting, each track of the disk is recorded at the start of continuous shooting. After the outer track was used for audio, during continuous shooting, the outer track was used for video sequentially from the inner track, and recording was performed on the track that was used for audio and on the track that was used for video at the time of the start of continuous shooting. A disc recording device characterized in that it is capable of recording audio signals related to video.